To Balance: Take a 1" piece of masking tape and place it on the light blade. Adjust the tape until the prop is in balance. The amount of tape will tell you how much material you will need to add or remove for final balancing.

In most cases, the weight of the tape is so slight it won't show up on a gram scale - say 1" or less of tape. If this is the case, the prop is within spec and can be flown without adding or removing material.

To Add Material: For g/f nylon props, place modeling clay or silver solder in the holes in the back of the hub of the light side until balanced. For wood props, try adding paint or nail polish to the back of the blade.

To Remove Material: For g/f nylon props, use a pocketknife to trim the "trailing"edges of the heavy blade. For both wood and g/f nylon, use sanding paper and take material from the heavy blade to bring into balance.

anyone read their website? I personally use MA but I have not had one that was bad. I had a graupner prop and it flexed so bad I 'm not sure I can use it. Have an apc prop to try but I am not messing with it untill my others are toast. I added "trailing" in the description. only because if you trim the tip, you will get vibration, if you mess with the leading edge, well, it will be bad.